Leaf-spring-eyelet-forming machine



w. EVANS LEAF SPRING EYELET FORMING MACHINE Filed Dec. 18, 1922 2 Sheets-Sheet 1 William Evans INVENTOR W. EVANS LEAF SPRING EYELET FORMING MACHINE Filed Dec. 18, 922 2 Sheets-Sheet 2 William Eva z g ATTORNEY ITNESS:

Patented idea. 233*, i924.

STAT 5 WILLIAM EVANS, or PHILADELPHIA,

some rare, VANIA.

L PHILADELPHIA, PENNSYLVANIA,

PENNSYLVANIA, ASSIGNOE '10 JOHN EVANS it. CORPORATION OF lENNSYL- LEAF-SPRINGr-EYELET-FORMING- 'ivIACHINE.

Application filed December 18, 1922. Serial No. 607,664.

To all whom it may concern:

Be it known that 1, WILLIAM Evens, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invente new and useful Improvements in Leaf- Spring-Eyelet-Forming Machines, of which the following is a specification.

This invention relates to a leaf spring eyelet forming machine and the principal object is to produce a simple and efficient means for forming eyelets in the ends of leaf springs.

Another object is to provide improved means for gripping and forming the spring.

Another object is to produce a device of this nature which shall consist of few parts, cheap to manufacture, easy to assemble and operate, and highly efficient for the purpose for which it is designed.

Another object is to provide adjustable means for taking care of different sizes and thicknesses of springs.

With these and other objects in view as will be more apparent hereinafter, the in vention consists in certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawings, in which F igure 1 is a top plan view proved machine.

Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a front elevation of the machine.

Fig. a s a detail of one portion of the lever construction.

Fig. 5 is an enlarged detail of the spindle members.

Like characters of reference refer to like parts in all the views. I The present invention contemplates the providing of a mechanical means for gripping the ends of leaf springs such as are used for automobiles, and of turning in the end of each spring operated on, an eyelet or ring to receive the shackle bolt as will be readily understood by those skilled in the automobile art.

Referring to the accompanying drawing, represents legs or supports which are shown as of angle iron although any suitable means may be used for this purpose.

of my im- Supported by the legs 10 is a table or superstructure 11 having a key-way 12 cut in its upper face.

A. pair of bearing brackets 18 are formed with keys 14: in their bases which keys are seated in the ways 12 so as to hold the brackets 18 in their required position, said brackets being secured to the table 11 by bolts 15 or any other suitable and desirable means. The brackets 13 are formed at their upper ends into bearings 16 which receive and rotatably support cylindrical trunnion elements 17 of an operating frame 18. The elements 17 are drilled through and support stub-shafts 19 and 20.

The frame 18 is a U-shaped device having legs 21 and 22 which carry at their front ends the trunnions 17, and which are connected at their rear ends by a web portion having an aperture 28. Extending downwardly from the legs 21 and 22, are ears 2 1 which support between them a short shaft 25 held in place by a cotter-pin 26. Supported upon the shaft 25 between the ears 242 is a sleeve 27 carrying an upwardly extending web 28. Secured to the upper end of the web 28 is a gripping member or aw 29 which is formed with an arcuate front face having a plurality of transverse teeth 30. Secured to or formed integrally with the j aw 29 is an upstanding member or bar 81, the upper end of which is embraced by a pair of links 32, bar 31 and links being connected by a pin 33 having a fingerpiece 84 whereby it may be easily inserted and withdrawn. Links 32 are arranged parallel with each other and are connected by a bolt 85 with a hand lever or operating member 36, the: lower end of which is pivotally connected at 37 between the cheeks of a clevis member 38 rigidly secured to the rear portion of the U-frame 18. A bar or short rod 39 is secured in the clevis member 38 so that the U-frame may be lifted up by hand in withdrawing or replacing parts. The purpose of the aperture 28 heretofore mentioned is so that a bar may be inserted therein to permit two persons to operate on the press when very heavy work is being operated on.

The inner ends of the stub shafts 19 and 20 heretofore mentioned project beyond the faces of the legs 21 and 22 and are drilled radially so as to provide apertures or sockets for the reception of the turned down post 53 lasing 'lirom ends 41 of a mandrel 42 the diameter of the body portion of the mandrel being the same as the inside diameter of the required spring loop .or eyelet. The shaft 20 is held in any desired position to which it is moved, by means of a set-screw 43; and the shaft 19 is provided at its :outer end with La .ciroumferential groove 44 into which a pin 45 projects. The pin 45 :is carriedzbythesupper of two parallel links or levers 46 which extend substantially from the ctroiitto the rear of the machine at the right 'hand side [thereof and which are held in spaced relation by bolts 47 .andsleeves or washers 48. .Mounted between the ront pair of washers 48 is hand lever 49 which may be held in "nigid extended relation by a pin 50. Upon withdrawing the min 50, the "hand lever 49 be tolded irearwardly. Between the rear pair of sleeves 48 is secured a bar 51 which is itastened at .52 to the top :03? a column or the base 111.

it will be seen that by means of the mechanism just described :the :stubshalit 1-9 may be moved inwardly and outwardly at will, (and yet will be rotatable in the bearing. Secured by :a hinge '54 :to the front of the table 11 is a work receiving end guiding; support T55 having upturned ears or edges .56 and providec l with setscrews ,57. Bars 58 .are utilized to tfil l out from the flettlhand guide 56 so as 'to accommodate the device .to various sizes of springs. 'llh-e warious thickness of [the spring operated upon will .detenmine the distance desirable between the inner end of the member =55 and the mandrel, and in order :to adjust this. an act z lusting :screw 59 'is aprovided to lilo-re the device 55 to the desired position.

The operation of the device may be describedias follows:

illhe metal which is to vbe worked upon is shownat A and isastripotune'tal which has been -.cham;ptered :at its .end and bent -=slight- Ily upwardly before being placed rill the machine. The "metal is :also preferably previously .heated and is then (thrust into the machine along the guiding plate 55 be- -.tween the set-screw 57 and the plates 58 imtil the rear end of the unetal is in rear of the mandrel 42 and fifOPWflIid from the serrated or toothed .jaw 29. The operator then .draw-s forward on lever 36 which by means ofilinks 32 forces the jaw 29:against the end portion of the strip of metal so as to bring it into initial contact with the thereon in the succeeding operation.

mandrel, the teeth biting into the heated metal so .as to prevent slippingvofathe EW 1e lever 36 is then drawn further forward with the resdltithatthe entire frame 1'8 is noved 011 the 'trunnions 17 in the bearings 16 so that the metal is wound or drawn around the mandrel, thereby forming an eyelet in the end :of the strip. It is of course understood that various sizes of mandrels may be used and that different forms of jaws 29 may be placed on the shaft .25, the :con retraction permitting !Oi the ready manipulaation of parts for this purpose. It will also be understood that :as .soon as the eyelet is bent, the l'randle- 49 may be thrown to the right thereby releasing the mandrel so that the eyelet an 1 spring may be readily withdrawn.

While I have-describedwhat l deem to be the most desirable embodiment "20f my invention, I-do'inot limit myself-to the specific details of construction or material, nor to ;anrthing less than the whole of my invention as defined in the appended claims.

What I claim is :1. In -.a device of the class described, the combination of a supporting device, .an operating trame rotatably supported thereby, an adjustable work support and guide, co-iqperative with said tramaamandrel sup- ;ported concentric with the axis of said frame, a jaw rotatably mounted on .said frame and adapted to grip material .interposed between .said jaw .and said mandrel, and handle pi-votally xmounted frame and connected to operating said said frame.

9. In .a leaf sp aw .and thereafter operating ring eyelet forming machine, .a main trams-work, bearings supported thereby, a U-shaped frame rotatably supported in said bearings, a mandrel mounted concentric with the axis of said ktrame, an adjustable work support and guide co-operating with .said frame, a rotatably mounted on,v said frame and ad .ed to ,grip material interposed between the jaw and mandrel, and a handle pivotally mounted =on said rztrame and connected to the jaw for first operating the ,jaw and thereafter -.oper ati,ng said \tra me. p

In testimony whereof :I alii my signature.

lVILLI-AM EVANS.

on said I said aw .for first 

